Ubisoft has also detailed the supported graphic cards at the time of the game’s release, and notes that Laptop models of these cards may work but are not supported.

Supported video cards at release

NVIDIA
GeForce GTX 460 or better, GTX 560 or better, GTX 650 or better, GTX 750 or better, or any card from the GT900 and Titan Series
AMD
Radeon HD5870 or better, HD6870 or better, HD7770 or better, R7 260X or better, or any card from the R-300 series and Fury X

Laptop models of these cards may work but are not supported. These chipsets are the only ones that will run this game. Additional chipsets may be supported after release. For an up-to-date list of supported chipsets, please visit the FAQ for this game on our support website: http://support.ubi.com

Rainbow Six Siege was announced last year, being developed exclusively for the PC, PS4 and Xbox One. In May of this year, Ubisoft announced that the game would be delayed to October, but in August the publisher decided to push back the release to December 1st. The Siege development team posted a message regarding the delay on the Ubisoft Blog:

Whether it’s been through playtests in our studios, the closed alpha, or recent hands-on demos at events like E3 or Gamescom, player feedback has been essential to the development of Rainbow Six Siege. Getting the game in people’s hands and listening to what they have to say helps us understand how we can improve their experience, and we’d like to thank everyone who’s taken part in the process so far.

With that in mind, we’ve decided to push the release date of Rainbow Six Siege to December 1, 2015 for all regions. This wasn’t an easy decision, but based on the feedback we’ve received, and based on our own internal tests, we felt there are adjustments and improvements we can make, including improving the co-op experience across all game modes, weapon and gadget balancing, as well as menu and interface navigation. We’re taking a little more time to make these changes, and we think it’s the right call.